Home / 20,981.24-28,954.32-11,550

Finding the Fourth Proportional to 20,981.24, 28,954.32 and 11,550

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Solution

The fourth proportional to 20,981.24, 28,954.32 and 11,550 is: 15,939.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.24 : 28,954.32 = 11,550 : x
  2. Step 2: Convert to fraction form
    20,981.24/28,954.32 = 11,550/x
  3. Step 3: Cross multiply
    20,981.24x = 28,954.32 × 11,550
  4. Step 4: Simplify right side
    20,981.24x = 334,422,396
  5. Step 5: Solve for x
    x = 334,422,396/20,981.24
  6. Step 6: Final answer
    x = 15,939.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.